Preservation of green fodder



- particularly good results are obtained if the en- NOa-group of which is linked to a physiologically Patented Oct. 13,1942 2,298,514

UNITED STATES PATENT OFFICE 2,298,514 PRESERVATION OF GREEN FODDER Friedrich Wilhelm Stauf sand Georg Janning, Leverkusen-I. G. Werk, Germany, assignors to Winthrop Chemical Company, Inc., New York, N. Y., a corporation of New York No Drawing. Original application August 9, 1939, Serial No. 289,178. Divided and this application October 12, 1940, Serial No. 360,972. In Germany August 15, 1938 4 Claims. (01. 99-8) This invention relates to improvements in the using mixtures of ammonium-free nitrites and preservation of green fodder. ammonium salts.

It is known to preserve green fodder by the The invention is illustrated by the following addition of acids or sugar. The handling of acids examples without, however, being restricted is very diflicult for the farmer; when using sugar thereto: there is lacking the suflicient security on silage. Example 1 It has now been found that mtrites (this term 0 03% of Sodium nitrite in aqueous-solution are including also complex nitrites) represent exceladded in the usual manner to 1000 of freshly lent preserving agents for green fodder. Often cut clover. After 3 weeks the S110 is opened and a. quantities of far below 1% are sufdcient to obtain sflagefodder with a PH=4 2' 193% of lactic acid silage effect even with plants rich in albumen and 0.50% of acetic acid is obtained. Neither For instance, sodium nitrite, potassium nitrite, calcium nitrite or organic nitrites such as ethyl mtnte nor mtrate could be detect-la in the rod nitrite may be used for this purpose.' Further- Example 2 more, complex nitrites, for instance, nitrito salts of heavy metals come into consideration. As A m t of 2 8 d 0-3 kg of S suitable nitrites of course only thos come i t dium nitrite is added to 1000 kgs. of freshly cut question in which the residue linked to the N03- clover by st ew in t e 1151181 ne After 6 group has no injurious effect on animals, weeks the silo is opened and a silage fodder with It is surprising that the NOz-group can n a pH=4.4, 1.59% of lactic acid and 0.42% of longer be chemically detected i th forage after acetic acid is obtained. Nitrite and nitrate could a few days. An injurious effect is therefore exnot be detected n the f 'fl eluded Example 3 The'said nitrites may be used as green fodder preserving agents in the usual manner, for in- 2 mlxture 2 calcium phosphate and stance, by watering the green fodder with an of 50mm nitrite is added to 1000 of aqueous solution of the nitrite compound. It has freshly cut in 3110b? strewlng in the proved to be particularly advantageous to strew usual manner- After 6 Weeks the l5 Opened into the fodder to be stored dry preparations and a silage odder with a pH=4.38, 1.50% of of t said compounds By the l ti lactic acid and 0.46% of acetic acid is obtained.

manner of application the nitrites are suitably T application is a division of application diluted with solid carriers in order to obtain a Serial 289,178- med August 1939- homogeneous distribution. As such diluents, for we claim:

instance, inert carriers which act simultaneously A composition f r pr s ing B w fodder as absorbents, such as diatomaceous earth, active comprising as its active ngredi nt i h carbon, silica, bleaching earths, such as fullers NOz-group Of which is linked $0.8 physiol gi lly earth come into question. Also mineral salts in o uo s rad lwhich are important for the nutrition of cattle, 2. A omposi ion f r preserving G n fodder such as, for instance, non-acid reacting phoscomprising 118 i s a tiv redien Wa r- 1 1- phates, chlorides or sulfates, as well as other 4 l inor anic nitrite. the Nos-gro p o which 1 agents suited as green fodder preserving agents, linked to physiologically lnnocuOuB radicalfor instance, sugar or wood sugar, can be mixed 3. A composition for preserving green fodder with the nitrites to be used according to the prescomprising nitrite the NOa-m l 0f WhlQh 18 out invention. The diluents and solvents for the ink d to physiolo ly 11111000118 dlwl d I nitrites have to be so chosen that the oxide of 111- preponderant quantity of a solid carrier. trogen is not prematurely freed from the nitrite. 4. A composition for preserving green fodder It has further been found that by using nitrites comprising a water-soluble inorganic nitrite, the

silage is performed in the simultaneous presence innocuous radical and a preponderant quantity of ammonium ions. 7 of a solid carrier. 7 Thus, for instance, ammonium nitrite may be 7 used as green fodder preserving agent. Espec- FRIEDRICH WILHELM STAUI".

ially good results are obtained on silage when GEORG JANNING. 

